CN113665823B - Hybrid freight unmanned aerial vehicle and freight transportation method - Google Patents
Hybrid freight unmanned aerial vehicle and freight transportation method Download PDFInfo
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- CN113665823B CN113665823B CN202110938695.8A CN202110938695A CN113665823B CN 113665823 B CN113665823 B CN 113665823B CN 202110938695 A CN202110938695 A CN 202110938695A CN 113665823 B CN113665823 B CN 113665823B
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- 238000000034 method Methods 0.000 title claims description 9
- 210000001015 abdomen Anatomy 0.000 claims abstract description 17
- 239000013535 sea water Substances 0.000 claims abstract description 15
- 239000000446 fuel Substances 0.000 claims abstract description 11
- 238000009792 diffusion process Methods 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000411 inducer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60V—AIR-CUSHION VEHICLES
- B60V3/00—Land vehicles, waterborne vessels, or aircraft, adapted or modified to travel on air cushions
- B60V3/08—Aircraft, e.g. air-cushion alighting-gear therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/026—Aircraft characterised by the type or position of power plants comprising different types of power plants, e.g. combination of a piston engine and a gas-turbine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U10/00—Type of UAV
- B64U10/25—Fixed-wing aircraft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U50/00—Propulsion; Power supply
- B64U50/10—Propulsion
- B64U50/11—Propulsion using internal combustion piston engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U50/00—Propulsion; Power supply
- B64U50/10—Propulsion
- B64U50/19—Propulsion using electrically powered motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U2101/00—UAVs specially adapted for particular uses or applications
- B64U2101/60—UAVs specially adapted for particular uses or applications for transporting passengers; for transporting goods other than weapons
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Remote Sensing (AREA)
- Transportation (AREA)
- Toys (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a hybrid cargo unmanned aerial vehicle, which comprises an unmanned aerial vehicle body and unmanned aerial vehicle wings, wherein the unmanned aerial vehicle wings are arranged on the unmanned aerial vehicle body, a fuel propeller power device is arranged on the unmanned aerial vehicle wings, and an electric propeller power device is arranged on a nose of the unmanned aerial vehicle body; the lower part of the machine head of the unmanned aerial vehicle body is provided with a slot, the slot is internally provided with a diversion structure, the machine head of the unmanned aerial vehicle body is internally provided with a driving device, the driving device is connected with the diversion structure, and the driving device drives the diversion structure to retract into the slot or extend out of the slot; the air inlet of the air guide structure faces the electric propeller power device, the air outlet of the air guide structure faces the belly of the unmanned aerial vehicle body, the cross-sectional area of the air inlet is larger than that of the air outlet, and the air outlet is strip-shaped. The invention adopts the electric equipment and the gasoline engine equipment to provide power for the unmanned aerial vehicle, and has a diversion structure, so that the resistance of sea water to the take-off of the unmanned aerial vehicle is reduced.
Description
Technical Field
The invention relates to a hybrid type freight unmanned aerial vehicle and a freight transportation method, and belongs to the technical field of large unmanned aerial vehicle freight equipment and freight transportation methods.
Background
With the development of technology, the field of unmanned aerial vehicle application is also becoming wider and wider. At present, the transportation of unmanned aerial vehicles in express delivery has appeared on the market, but generally all are the road surface address that unmanned aerial vehicles flight distance is nearer. Unmanned aerial vehicle equipment for distributing goods on the sea surface is not available, mainly because the unmanned aerial vehicle has larger takeoff resistance on the sea surface, and seawater has larger resistance on the unmanned aerial vehicle, so that the takeoff energy consumption is larger.
Disclosure of Invention
The invention aims to provide a hybrid freight unmanned aerial vehicle, which adopts electric equipment and gasoline engine equipment to provide power for the unmanned aerial vehicle and has a diversion structure, so that a layer of air cushion can be formed between the unmanned aerial vehicle body and seawater, and the resistance of the seawater to take off of the unmanned aerial vehicle is reduced.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides a mixed dynamic formula freight unmanned aerial vehicle, includes unmanned aerial vehicle fuselage and unmanned aerial vehicle wing, and unmanned aerial vehicle wing installs on unmanned aerial vehicle fuselage, installs fuel screw power device on the unmanned aerial vehicle wing, installs electronic screw power device on the aircraft nose of unmanned aerial vehicle fuselage; the lower part of the machine head of the unmanned aerial vehicle body is provided with a slot, the slot is internally provided with a diversion structure, the machine head of the unmanned aerial vehicle body is internally provided with a driving device, the driving device is connected with the diversion structure, and the driving device drives the diversion structure to retract into the slot or extend out of the slot; the air inlet of the air guide structure faces the electric propeller power device, the air outlet of the air guide structure faces the belly of the unmanned aerial vehicle body, the cross-sectional area of the air inlet is larger than that of the air outlet, and the air outlet is strip-shaped.
In the aforesaid hybrid cargo unmanned aerial vehicle, when the water conservancy diversion structure is located the trench, the lower surface of water conservancy diversion structure and the surface of unmanned aerial vehicle fuselage form streamlined.
In the aforesaid hybrid cargo unmanned aerial vehicle, the water conservancy diversion structure has a plurality of water conservancy diversion passageway, separates through the baffle between the adjacent water conservancy diversion passageway.
In the hybrid cargo unmanned aerial vehicle, the diversion channel comprises a diversion section and a diffusion section which are communicated, wherein an inlet of the diversion section faces the electric propeller power device, an outlet of the diversion section is communicated with an inlet of the diffusion section, and an outlet of the diffusion section faces a belly of the unmanned aerial vehicle body; the outlet width of the diffusion section is larger than the inlet width of the diffusion section, and the outlet height of the diffusion section is lower than the inlet height of the diffusion section.
In the hybrid freight unmanned aerial vehicle, the outlet of the diffusion section is provided with the guide block, the guide block is wedge-shaped, and the sharper end of the wedge-shaped guide block faces the guide section.
In the aforementioned hybrid cargo unmanned aerial vehicle, the ratio of the outlet width of the diffuser section to the outlet height of the diffuser section is 7:1 to 3:1, the ratio of the inlet width to the inlet height of the diversion section is 2:1 to 1: and 1, a wind speed sensor is arranged in the diffusion section and is electrically connected with a controller of the unmanned aerial vehicle, and the controller is electrically connected with an electric propeller power device.
In the aforementioned hybrid cargo unmanned aerial vehicle, the ratio of the outlet width of the diffuser section to the outlet height of the diffuser section is 5:1 to 3:1, the ratio of the inlet width to the inlet height of the diversion section is 1.5:1.
The utility model provides a cargo transportation method for transport cargo to sea area adopts above-mentioned hybrid cargo transportation unmanned aerial vehicle, includes the following content: loading cargo into the unmanned aerial vehicle; controlling the unmanned aerial vehicle to fly to a designated position; landing the unmanned aerial vehicle on the sea surface; taking out the goods on the unmanned plane; and returning the unmanned aerial vehicle.
In the cargo transportation method, the unmanned aerial vehicle return comprises the following steps: before the unmanned aerial vehicle takes off on the sea, the diversion structure is stretched out of the groove position through the driving device; the fuel propeller power device and the electric propeller power device are started simultaneously, air flow generated by the electric propeller power device enters the inlet of the diversion channel and is discharged from the outlet of the backflow channel, the air flow acts on the belly part of the unmanned aerial vehicle body, an air cushion is formed between the belly and the sea surface of the unmanned aerial vehicle body by the air flow, and the resistance of sea water to the unmanned aerial vehicle body is reduced.
In the cargo transportation method, the unmanned aerial vehicle return comprises the following steps: the wind speed sensor detects the wind speed in the diffusion section, and if the wind speed does not reach the designated speed, the wind speed sensor indicates that no enough air cushion is formed between the unmanned aerial vehicle and the seawater, and the output power of the electric propeller power device is continuously increased; and if the wind speed reaches the specified speed, the unmanned aerial vehicle and the sea water form enough air cushion, and the output power of the electric propeller power device is stopped from being increased.
Compared with the prior art, the unmanned aerial vehicle power supply system adopts the electric equipment and the gasoline engine equipment to supply power for the unmanned aerial vehicle, has the flow guide structure, can form a layer of air cushion between the unmanned aerial vehicle body and the seawater, and reduces the resistance of the seawater to the take-off of the unmanned aerial vehicle. The fuel propeller power device is arranged on the unmanned aerial vehicle wing to provide long-term and stable power output for the unmanned aerial vehicle; the aircraft nose of unmanned aerial vehicle fuselage is last to install electronic screw power device, can be quick reach power output peak value of power device, makes unmanned aerial vehicle take off from the sea soon.
Drawings
FIG. 1 is a schematic top view of one embodiment of the present invention;
FIG. 2 is a schematic side view of an embodiment of the present invention;
FIG. 3 is a schematic view of an embodiment of a reverse flow structure;
FIG. 4 is a schematic diagram of an embodiment of a diversion channel.
Reference numerals: the device comprises a 1-unmanned aerial vehicle body, a 2-unmanned aerial vehicle wing, a 3-fuel propeller power device, a 4-electric propeller power device, a 5-slot position, a 6-flow guiding structure, 7-flow guiding blocks, 8-flow guiding channels, 9-diffusion sections, 10-backflow sections and 11-baffles.
The invention is further described below with reference to the drawings and the detailed description.
Detailed Description
Example 1 of the present invention: the utility model provides a mixed dynamic formula freight unmanned aerial vehicle, includes unmanned aerial vehicle fuselage 1 and unmanned aerial vehicle wing 2, and unmanned aerial vehicle wing 2 installs on unmanned aerial vehicle fuselage 1, installs fuel screw power device 3 on the unmanned aerial vehicle wing 2, installs electric screw power device 4 on the aircraft nose of unmanned aerial vehicle fuselage 1; the lower part of the machine head of the unmanned aerial vehicle body 1 is provided with a slot 5, a diversion structure 6 is arranged in the slot 5, a driving device is arranged in the machine head of the unmanned aerial vehicle body 1 and is connected with the diversion structure 6, and the driving device drives the diversion structure 6 to retract into the slot 5 or extend out of the slot 5; the air guide structure 6 is provided with an air inlet and an air outlet, the air inlet of the air guide structure 6 faces the electric propeller power device 4, the air outlet of the air guide structure 6 faces the belly of the unmanned aerial vehicle body 1, the cross-sectional area of the air inlet is larger than that of the air outlet, and the air outlet is in a strip shape.
When the diversion structure 6 is positioned in the slot 5, the lower surface of the diversion structure 6 and the surface of the unmanned aerial vehicle body 1 form a streamline. The flow guiding structure 6 is provided with a plurality of flow guiding channels 8, and the adjacent flow guiding channels 8 are separated by baffle plates 11.
The diversion channel 8 comprises a diversion section 10 and a diffusion section 9 which are communicated, wherein the inlet of the diversion section 10 faces the electric propeller power device 4, the outlet of the diversion section 10 is communicated with the inlet of the diffusion section 9, and the outlet of the diffusion section 9 faces the belly of the unmanned aerial vehicle body 1; the outlet width of the diffuser section 9 is greater than the inlet width thereof, and the outlet height of the diffuser section 9 is lower than the inlet height thereof. The outlet of the diffusion section 9 is provided with a guide block 7, the guide block 7 is wedge-shaped, and the sharper end of the wedge-shaped guide block 7 faces the guide section 10.
The ratio of the outlet width of the diffuser section 9 to the outlet height of the diffuser section 9 is 7:1, the ratio of inlet width to inlet height of the inducer 10 is 2:1, a wind speed sensor is arranged in the diffusion section 9 and is electrically connected with a controller of the unmanned aerial vehicle, and the controller is electrically connected with the electric propeller power device 4.
Example 2: the utility model provides a mixed dynamic formula freight unmanned aerial vehicle, includes unmanned aerial vehicle fuselage 1 and unmanned aerial vehicle wing 2, and unmanned aerial vehicle wing 2 installs on unmanned aerial vehicle fuselage 1, installs fuel screw power device 3 on the unmanned aerial vehicle wing 2, installs electric screw power device 4 on the aircraft nose of unmanned aerial vehicle fuselage 1; the lower part of the machine head of the unmanned aerial vehicle body 1 is provided with a slot 5, a diversion structure 6 is arranged in the slot 5, a driving device is arranged in the machine head of the unmanned aerial vehicle body 1 and is connected with the diversion structure 6, and the driving device drives the diversion structure 6 to retract into the slot 5 or extend out of the slot 5; the air guide structure 6 is provided with an air inlet and an air outlet, the air inlet of the air guide structure 6 faces the electric propeller power device 4, the air outlet of the air guide structure 6 faces the belly of the unmanned aerial vehicle body 1, the cross-sectional area of the air inlet is larger than that of the air outlet, and the air outlet is in a strip shape.
When the diversion structure 6 is positioned in the slot 5, the lower surface of the diversion structure 6 and the surface of the unmanned aerial vehicle body 1 form a streamline. The flow guiding structure 6 is provided with a plurality of flow guiding channels 8, and the adjacent flow guiding channels 8 are separated by baffle plates 11.
The diversion channel 8 comprises a diversion section 10 and a diffusion section 9 which are communicated, wherein the inlet of the diversion section 10 faces the electric propeller power device 4, the outlet of the diversion section 10 is communicated with the inlet of the diffusion section 9, and the outlet of the diffusion section 9 faces the belly of the unmanned aerial vehicle body 1; the outlet width of the diffuser section 9 is greater than the inlet width thereof, and the outlet height of the diffuser section 9 is lower than the inlet height thereof. The outlet of the diffusion section 9 is provided with a guide block 7, the guide block 7 is wedge-shaped, and the sharper end of the wedge-shaped guide block 7 faces the guide section 10.
The ratio of the outlet width of the diffuser section 9 to the outlet height of the diffuser section 9 is 3:1, the ratio of inlet width to inlet height of the inducer 10 is 1:1, a wind speed sensor is arranged in the diffusion section 9 and is electrically connected with a controller of the unmanned aerial vehicle, and the controller is electrically connected with the electric propeller power device 4.
Example 3: the utility model provides a mixed dynamic formula freight unmanned aerial vehicle, includes unmanned aerial vehicle fuselage 1 and unmanned aerial vehicle wing 2, and unmanned aerial vehicle wing 2 installs on unmanned aerial vehicle fuselage 1, installs fuel screw power device 3 on the unmanned aerial vehicle wing 2, installs electric screw power device 4 on the aircraft nose of unmanned aerial vehicle fuselage 1; the lower part of the machine head of the unmanned aerial vehicle body 1 is provided with a slot 5, a diversion structure 6 is arranged in the slot 5, a driving device is arranged in the machine head of the unmanned aerial vehicle body 1 and is connected with the diversion structure 6, and the driving device drives the diversion structure 6 to retract into the slot 5 or extend out of the slot 5; the air guide structure 6 is provided with an air inlet and an air outlet, the air inlet of the air guide structure 6 faces the electric propeller power device 4, the air outlet of the air guide structure 6 faces the belly of the unmanned aerial vehicle body 1, the cross-sectional area of the air inlet is larger than that of the air outlet, and the air outlet is in a strip shape.
When the diversion structure 6 is positioned in the slot 5, the lower surface of the diversion structure 6 and the surface of the unmanned aerial vehicle body 1 form a streamline. The flow guiding structure 6 is provided with a plurality of flow guiding channels 8, and the adjacent flow guiding channels 8 are separated by baffle plates 11.
The diversion channel 8 comprises a diversion section 10 and a diffusion section 9 which are communicated, wherein the inlet of the diversion section 10 faces the electric propeller power device 4, the outlet of the diversion section 10 is communicated with the inlet of the diffusion section 9, and the outlet of the diffusion section 9 faces the belly of the unmanned aerial vehicle body 1; the outlet width of the diffuser section 9 is greater than the inlet width thereof, and the outlet height of the diffuser section 9 is lower than the inlet height thereof. The outlet of the diffusion section 9 is provided with a guide block 7, the guide block 7 is wedge-shaped, and the sharper end of the wedge-shaped guide block 7 faces the guide section 10.
The ratio of the outlet width of the diffuser section 9 to the outlet height of the diffuser section 9 is 5:1 to 3:1, the ratio of inlet width to inlet height of the inducer 10 is 1.5:1, a wind speed sensor is arranged in the diffusion section 9 and is electrically connected with a controller of the unmanned aerial vehicle, and the controller is electrically connected with the electric propeller power device 4.
A cargo transportation method for transporting cargo to a sea area, the hybrid cargo transportation unmanned aerial vehicle according to the above embodiment, comprising: loading cargo into the unmanned aerial vehicle; controlling the unmanned aerial vehicle to fly to a designated position; landing the unmanned aerial vehicle on the sea surface; taking out the goods on the unmanned plane; and returning the unmanned aerial vehicle.
The unmanned aerial vehicle return journey comprises the following steps: before the unmanned aerial vehicle takes off on the sea, the guide structure 6 is stretched out of the groove position 5 through the driving device; the fuel propeller power unit 3 and the electric propeller power unit 4 are started simultaneously, air flow generated by the electric propeller power unit 4 enters the inlet of the diversion channel 8 and is discharged from the outlet of the backflow channel, the air flow acts on the belly part of the unmanned aerial vehicle body 1, an air cushion is formed between the belly and the sea surface of the unmanned aerial vehicle body 1 by the air flow, and the resistance of sea water to the unmanned aerial vehicle body 1 is reduced. The wind speed sensor detects the wind speed in the diffusion section 9, and if the wind speed does not reach the designated speed, the air cushion is not formed between the unmanned aerial vehicle and the seawater, and the output power of the electric propeller power device 4 is continuously increased; if the wind speed reaches the specified speed, the unmanned aerial vehicle and the sea water form enough air cushion, and the output power of the electric propeller power device 4 stops increasing.
Claims (1)
1. The utility model provides a mixed dynamic formula freight unmanned aerial vehicle, includes unmanned aerial vehicle fuselage (1) and unmanned aerial vehicle wing (2), and unmanned aerial vehicle wing (2) are installed on unmanned aerial vehicle fuselage (1), its characterized in that installs fuel screw power device (3) on unmanned aerial vehicle wing (2), installs electric screw power device (4) on the aircraft nose of unmanned aerial vehicle fuselage (1); the lower part of the machine head of the unmanned aerial vehicle body (1) is provided with a slot (5), the slot (5) is internally provided with a diversion structure (6), the machine head of the unmanned aerial vehicle body (1) is internally provided with a driving device, the driving device is connected with the diversion structure (6), and the driving device drives the diversion structure (6) to retract into the slot (5) or extend out of the slot (5); the air inlet of the air guiding structure (6) faces the electric propeller power device (4), the air outlet of the air guiding structure (6) faces the belly of the unmanned aerial vehicle body (1), the cross-sectional area of the air inlet is larger than that of the air outlet, and the air outlet is strip-shaped;
when the flow guiding structure (6) is positioned in the groove (5), the lower surface of the flow guiding structure (6) and the surface of the unmanned aerial vehicle body (1) form a streamline;
the flow guiding structure (6) is provided with a plurality of flow guiding channels (8), and the adjacent flow guiding channels (8) are separated by baffle plates (11);
The guide channel (8) comprises a guide section (10) and a diffusion section (9) which are communicated, wherein the inlet of the guide section (10) faces the electric propeller power device (4), the outlet of the guide section (10) is communicated with the inlet of the diffusion section (9), and the outlet of the diffusion section (9) faces the belly of the unmanned aerial vehicle body (1); the outlet width of the diffusion section (9) is larger than the inlet width of the diffusion section, and the outlet height of the diffusion section (9) is lower than the inlet height of the diffusion section;
the outlet of the diffusion section (9) is provided with a guide block (7), the guide block (7) is wedge-shaped, and the sharper end of the wedge-shaped guide block (7) faces the guide section (10);
The ratio of the outlet width of the diffuser section (9) to the outlet height of the diffuser section (9) is 5:1 to 3:1, the ratio of the inlet width to the inlet height of the diversion section (10) is 1.5:1, a step of; a wind speed sensor is arranged in the diffusion section (9), the wind speed sensor is electrically connected with a controller of the unmanned aerial vehicle, and the controller is electrically connected with an electric propeller power device (4);
The cargo transportation method of the hybrid cargo unmanned aerial vehicle is used for transporting cargoes to the sea area and comprises the following steps: loading cargo into the unmanned aerial vehicle; controlling the unmanned aerial vehicle to fly to a designated position; landing the unmanned aerial vehicle on the sea surface; taking out the goods on the unmanned plane; returning the unmanned aerial vehicle;
the unmanned aerial vehicle return journey comprises the following steps: before the unmanned aerial vehicle takes off at sea, the guide structure (6) is stretched out of the groove (5) through the driving device; the fuel propeller power device (3) and the electric propeller power device (4) are started at the same time, air flow generated by the electric propeller power device (4) enters an inlet of the diversion channel (8) and is discharged from an outlet of the backflow channel, the air flow acts on a belly part of the unmanned aerial vehicle body (1), an air cushion is formed between the belly and the sea surface of the unmanned aerial vehicle body (1) by the air flow, and the resistance of sea water to the unmanned aerial vehicle body (1) is reduced;
The wind speed sensor detects the wind speed in the diffusion section (9), and if the wind speed does not reach the designated speed, the air cushion is not formed between the unmanned aerial vehicle and the sea water, and the output power of the electric propeller power device (4) is continuously increased; if the wind speed reaches the specified speed, the unmanned aerial vehicle and the sea water form enough air cushion, and the output power of the electric propeller power device (4) is stopped from being increased.
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| CN202110938695.8A CN113665823B (en) | 2021-08-16 | 2021-08-16 | Hybrid freight unmanned aerial vehicle and freight transportation method |
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| CN202110938695.8A CN113665823B (en) | 2021-08-16 | 2021-08-16 | Hybrid freight unmanned aerial vehicle and freight transportation method |
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| CN107472530A (en) * | 2016-06-08 | 2017-12-15 | 上海优伟斯智能***有限公司 | Amphibious or overwater flight device waterproof sealing cabin |
| CN112606991A (en) * | 2020-12-29 | 2021-04-06 | 中国航空工业集团公司西安飞机设计研究所 | Double-fuselage unmanned freight airplane |
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